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Finding the Fourth Proportional to 135,701.79, 187,145.91 and 84,719.25

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Solution

The fourth proportional to 135,701.79, 187,145.91 and 84,719.25 is: 116,836.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,701.79 : 187,145.91 = 84,719.25 : x
  2. Step 2: Convert to fraction form
    135,701.79/187,145.91 = 84,719.25/x
  3. Step 3: Cross multiply
    135,701.79x = 187,145.91 × 84,719.25
  4. Step 4: Simplify right side
    135,701.79x = 15,854,861,135.77
  5. Step 5: Solve for x
    x = 15,854,861,135.77/135,701.79
  6. Step 6: Final answer
    x = 116,836.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.